Oscillating fan.



E. MAHELLI.

osclLLATlNG FAN.

APPLICATION FILED MAY 8, 1912.

1,138,390. Patented May 4, 1915.

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THE NcRRls PETERS CQ, FHOm-LITHQ, WASHING TUN, D. c.

E. MARELU.

OSCILLATING FAN.

APPLICATION FILED MAY s, 1912.

` 11,138,390, Patented 4, 1915.

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",E. MARI-LLM.

`OSCILLATING FAN.

APPLICATION FILEDv MAY 8, 1912.

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E. NIAIIELLI.

OSCILLATING FAN.

APPLICATION FILED MAY 8. 1912.

1,138,390. Patented May 4, 1915.

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ERCOLE MARELLI, 0F MILAN, ITALY.

OSCILLATING FAN.

Specification of Letters Patent.

Patented May a, 1915.

Application filed May 8, 1912. Serial No. 695,856. i

To all whom it may concern.'

Be it known that I, ERCOLE MARELLI, subject of the King of Italy, resident of No. 3

are shown by way of example in the annexed drawings in which: 4

Figure l is a section along the axle of a fan mounted on apedestal; Fig. 2 a view of asimilar fan mounted on a bracket; Fig.

. 3 a front view partly in section; Fig. 4: a

plan of the guiding disk hereinafter referred to; Fig. 5 shows the transmission gearing controlling the oscillatory motion; Fig. .6 shows a detailed sectional view of a modified arrangement of such transmission gearing in vertical section; Fig. 'Tis a hori- Zontal section and Fig. 8 a plan from beneath of Fig. 6.

The arrangement hereinafter described may be of course applied to any fan of this general type.

The standard a which carries the motor casing Z divides at the top into two arms c at the endsof which the casing b is pivotally mounted. A controlling screw e allows of fixing the casing b under any desired'angle of inclination.

The shaft a of the motor A is journaled in the bearings, b b of the casing o and is provided, at a point intermediate the said journal bearings and within the casing, with a worm a2.

The standard en is secured at its base to a box which is open underneath and embraces a disk g fixed to a pivot c The pivot enters at its top a hollow cylindrical space Z- provided' inthe lowest part of the standard a while it enters at its bottom either the pedestal lt (Fig. l) or the bracket c (Fig. 2),.the connection being obtained in either case by means of a fixing screw M so as to prevent any rotary motion of the disk .wg-,1

with respect to the pedestal lt or the bracket k Y Y A screw n enters a circular notch with which the pivot /J is provided near its top. rlhis arrangement while preventing the standard a from being removed from the pivot z' allows the same to rotate round said pivot.

rlhe disk g located inside the rotatable box f is fitted with an annular slot O of convenient angular extent, inside which a metal strip provided either with pins p or with a double set of teeth is located, thus forming a double circular rack or rack segment, furnishing an endless guide for a pinion or the like capable of meshing' with said rack. rIhis strip stops somewhat short of both ends of the slot. This meshing is obtained by means of the swinging rod Q `(Fig. 5) driven at its top from the fan axle by means of a worm wheel r which worm-wheel meshes with the worm (z2 and provided with two universal joints s s which allow it to freely oscillate. At its bottom the rod Q enters a sleeve secured to the box f and ends in a small pinion v meshing with the circular rack ;o and in a point z intended to be guided along the slot O As shown in Fig. 5 the rod Q consists of two parts telescopically connected so as to be extensibleV or capable of varying in length according to the angular displacement of the axis of rotation of the fan wheel as controlled by means of the screw e The pinion o meshing with the rack.' ;0 follows for instance at rst the internal contour of the slot O but, as soon as it reaches the end thereof, it shifts itself radially toward the external periphery of said slot O which is of course only pos'- sible in view of the universal joints s s and the variable length of the rod Q A slot is provided in the box f (Fig. 5) to permit this radial shift of the rod Q and pinion 'o' to occur. The sleeve 15 secured to the box f and standard a follows the displacement of the rod g l cillatory motion is therefore transmitted to the standardl a themotor casing, consequently to the motorV itself and the fan wheel. Therangular width of such oscillatory metio!! depends upon the angular exand Anosto the pivot elintended toenter the pedestal -L- (Fig. 1) or the bracket --c- (Fig. 2). rihe box lid-fcarrying the standard a of the fan is rotatable relatively to said disk g'. The rod -g- (Fig.`

2) of the transmission gearing actuated by the axis of the fan enters a sleeve -1- (Fig. 6) and ends as in the former construction in a small pinion -e-. The latter is secured to the lid of the box -fand instead of displacing itself radially as in the former case rotates round the axis of the pivot -z'-, displacing itself alternately in opposite directions along a circular arc of constant radius, while the circular rack or rack segment -pis carried by a base or block which is movableand capable of radial displacement on disk g. The point of the axle carrying the pinion -fU- is guided along the double slot or groove -0- in the rack base, the teeth or pins of the movable rack segment being thus held in en'- gagement with the pinion. It ensues therefrom that the box lid -fand the fan which are both secured to the said pinion, perform oscillation of equal angular Width. The base of rack -p-, on its under or opposite face is fitted with a bolt -gwhich enters a radial slit -s-` with which the fixed disk -gis provided. While the pinion -o alternatively meshes either on the inside or on the outside of the rack, the rack is allowed by the aforesaid radial slit -s to be displaced radially either inwardly or outwardly with respect to the fixed disk -g--, said displacement being confined within the desired limits. A boss fixedk to or integral with the pivot -zfurnishes a support to the rotatable box lid What I claim is: f f

1. An oscillating fan-apparatus comprising the combination with a fan mounted for rotation on a suitable shaft, a motor arranged to drive the shaft, and a movable mounting for the foregoing parts, capable of oscillating about an axis, of a stationary base supporting said movable mounting, a double rack carried by said base and concentric with the axis, a pinion mounted on a shaft shiftably secured to said movable mounting and arranged to engage said rack, a flexibleand extensible driving connection between the pinion shaft and the motordriven shaft for rotating said pinion, and guiding means for the double rack, said guiding means being arranged to shift the rack periodically so as to bring the pinion into engagement with dierent parts of the same and thus to cause oscillation of the movable fan mounting and the parts carried thereby.

2.An oscillating fan apparatus comprising the combination with a fan mounted on a power driven shaft, a movable support for said shaft capable of oscillation about an axis, and a stationary base carrying said support, of a pinion carried by said support and arranged to move therewith in an arc of fixed radius, a rack segment mounted on said base but capable of limited movement relative thereto and arranged to mesh with said pinion, and means for transmitting power from the fan shaft to the pinion.

3. An oscillating fan apparatus comprising the combination with a fan mounted on a power driven shaft, a movable support for said shaft capable of oscillation about an axis, and a stationary base carrying said support, of a pinion carried by a shaft rigidly mounted on said support, a rack segment carried by said stationary base but movable relatively thereto, means for insuring continuous engagement of said pinion with said rack segment, and means for driving the pinion shaft.

1. An oscillating fan apparatus comprising the combination with a fan mounted on a power driven shaft, a movable support for said shaft capable of oscillation about an axis, and a stationary base carrying said support, of a pinion carried by a shaft mounted on said support, a member provided with a rack segment carried upon said stationary base, a sliding connection between said member and-said stationary base, means for maintaining the pinion and rack segment in mutual engagement, and means for driving the pinion shaft.

5. An oscillating fan apparatus comprising the combination with a fan mounted on a power driven shaft, a movable support for said shaft capable of oscillation about an axis, and a stationary base carrying said support, of a pinion carried by a shaft rigidly mounted on said support, a member provided with a rack segment carried upon said stationary base, a pin projecting from said member and arranged to work in a slot in said stationary base, a double guiding groove or slot in said member arranged to cooperate with one end of the pinion shaft, and means for transmitting power from the fan shaft to the pinion shaft.

6. In an oscillating fan apparatus, the combination with a fan, a motor and a power driven shaft for the same, a casing inclosing the motor and provided with journal bearings fory the'power driven shaft on each side of the motor, a movable support for the casing capable of oscillating about an axis, a box secured to the movable support and a stationary base carrying the support, ofV a rack segment carried upon the stationary base and concentric with its axis, a sliding of the casing and arranged to engage with connection between the rack segment and the the worm-wheel. 10 stationary base, a flexible and eXtensible In testimony whereof I hereunto aix my power transmission shaft provided at one signature in the presence of two witnesses.

end with a pinionengaging with the rack ERCOLE MARELLI.

segment and at its other end with a worm Witnesses: wheel, and a worm mounted on the power BARTO SALVATI,

- driven shaft between the journal bearings C. C. BRoY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

